Locomotive-boiler and steam-superheater.



No. 863,333." PATBNTED AUG. 1-3, 1907.

H. H. VAUGHAN. LQCOMOTIVE BOILER AND STEAM SUPERHEATBR. APPLIOATION FILED NOV. 5. 190a. A

FZG- A I i I v II- Wii'n asses 2 SHEETS-SHEET 1.

I PATENTED AUG. 13, 1907. H. H. VAUGHAN. LOUOMOTIVB BOILER AND STEAM $UPERHEATER.

2 SHEETS-SHEET 2.

lhl vu APPLIOATIONQILED NOV. 5. 1908.

Inven tar .H nm 1i. Vaughan,

Witnesses.-

orrion;

noooivrorrvn-normn, AND, STEAM-SUPERHEATER.

I Specification of Letters Patent.

Patented Au 1 3, 1907.

Application filed November 5,1906. Serial No. 3 2,100.

To all mhom 'fl may-concern:

13c il-luimvn that I, HENRY H VAUGH N, a citizen of the U nited States, and a resident of Montreal, Quebec, Canada, have invented a certain new, useful, and Improved Locomotive-Boiler and Steam-Superh eater,-of which the'following is a full, clear, and exact description, such as will ,enable others skilled in the art to which it appertains -to makeanduse the same. My invention relates to improvements in' steam gen-' erator's and has particular reference to improvements in loconioti-ve'boileis and improyements in superheaters for such boilers.' i

Theparticular objects of my invention areto improve the construction of locomotive boilers witha view to adapting the same for use with superheatels,

having a large number of'superheating'doops or tubes,"

whieh are located within the body portion of the boiler and to provide an 'eflicient and durable steam superheater which shall be of simple construction and' low. cost. a i i Still further objects hereinafter.

.My invention consists generally in a locomotive 02 my invention will appear boilerof the fire tube type, but which contains a superheater recess or chamber in its forward part and further my invention consists in a novel superheater particularly adapted for arrangement in the space thus 4 provided. v

My invention consists particularly in a 'superheat'er arranged within a large flue of the boiler and comprising a plurality'of superheater' loops or tubes, in c'ombi:

nation with a plurality ofsaturate'and superheated steam headers or passages arranged at'the forward end I The invention will more readily understood by; reference tothe accompanying drawing and in which;

of the boiler and connected respectively to the boiler dry pipe and the'steam chests of the engines. 5

My invention also particularly consists in a locomo-I tive boilercontaining a large number of fines and and an enlarged superheater containing fiueichambsr or recess whichvv is-conn'ec ted with the fire'boxby rality of short flues. sists .in -novel means whereby the flow of a pin:

structions'and in combinations f parts, all as hereiii-- after 'ilesc'ribed andparticularly pointed Ollli;il1 the clainq sa Figurel'is a vertical longitudinal sectionon the line;

X, X;ofFig. 2 illustrating a locomotive boiler, pro- 'vided' with a superheater, embodyinginy invention;

-' Fig; 2' is a horizontal section on the-line Y Y of Fig. l; Fig. 3 isan enlarged vertical section on theline ZZ 'section on the line Z-UZ of Fig.1.

ternal shell or cylinder And further my inventioncon-sv of 1, the regulating damperbeing shown closed instead of open as in F ig; 1; Fig. 4 isatransvc'rse vertical i The locomotive. boiler, A, which is shown in the drawings is, generallyspeaking, of a common type, but this boiler differs from all others'in that it is provided with what I term a superheater recess or internal chamher or'shell, B. v A is the fire boxfflue sheet of the boiler, and A is the forward or front end flue sheet. These flue sheets are connected bya large number of fire tubesor flues, A.

- 0, represents the smoke box containing the usual Y nozzle, D, petticoatpipes, D and screen,'E. 1 F, representsthedryisteam pipe of the boiler and GG the steam feed pipes, which are connected with the engine steam chests (not shown) on opposite, s.des .of the boiler. I f r The snperheater-hereinafter described is interposed .between the dry,;pipe,-F, and the pipes, G G. The

shell or cylinder, .13, occupies the space usually occupied bythe central fire tubes ofa boiler and is arranged below the uppermost lines, A i. e. below the water lineof the boiler. This shell constitutes an internal wall of the boiler and itsopen forward end is properly secured in thefforwarcl flue sheet, A? The shell is preferably corrugated to permit its expansion and'con-,

j traction. It is shorter than the boiler, extending only partway back to the rear flue sheet, A The rear cnd of the she ll is closed byia small circular flue sheet, B

and the shell is connected with the fire box of the boiler by a plurality of short fiues, Afl-extending through the ue s i i a d constitutes and provides a cavityor recess Within the forward part of the boiler and" jvithin this I arrange the major portion of the steam uperheaterfi'" Said'superheater comprises a plurality or return" tubes or loops, H. Thetbody or group of tubes; H substantially conforms to and frees the angases inthe}, i enlarged. flue or recess may be controlled. i k

My invention also consists in various 'nove'l- -con-' nularj cylinder or recess aiid'the casting, it, substantially closes the forward end 'ofsaid recess. The tubes orloo'ps, I E[ are relatively of less length than the cylili-i l der, B',' so that a considerable space, B remains -bctween the rear ends ofthe-superheater pipes the flue sheet, B. The hot gases from "the ire her; enter the super-heater recess through the fines, A and fiow forward therein to the smoke box In this manner the 'superheatingtub'es are exposedfio intense heat; The swiftly flowing hot gases fron i' tlie fines, A, "lose much .of their velocity within the large recess orsuperheater chamber through expansion. In cons equence the. 105.

flow of the'hot gases through the body-oi superheating It will be evident that the inf :stearn fducts ormembers preferably all within-a sin- 90 gle metal-casting, H, and a large number of small bent of the gases for a greater length of time than would be tubes arranged within the long fire tubes of the boiler.

To further retard the flow of the gases and effectually equalize the temperature throughout the recess, I provide a number of forwardly'i'nclined deflecting plates, 1, within the shell, B. These plates also serve to support the supernater pipes, H in their proper positions, and may be attached either to said pipes or to the inner walls of the shell, B. ,The more convenient way super-heater. I As before stated the casting, H, which;

contains steam passages, communicating with the superheating pipes, H, occupies a position directlyin front of the superheater recess or cavity and substantially closes the forward end thereof. To complete the closure, I employ a sheet metal cylinder, J, which joins the member, H, to the fine sheet, A The lower part of the cylinder, .l, is formed by a movable shutter or damper, .l, suitablyhinged upon the flange of the flue sheet, A and operable. by means of a rock shaft, J provided with an operating ar'm, F, on the exterior of the jsmo'ke'hox or-front end, C, This arm is arranged for operation in any suitable manner, as by a leverarid rod extending from the locomotive cab, or by an automatic steam actuated mechanismconnected with the steam chest of one of the engines. The provision of such means for operating the damper, J, is within the province of an ordinary mechanic, and hence I have deemed it unnecessary to illustrate the operating mechanism.

ltwill be obvious that when the damper, J, is open,

- I as shown in Fig. 1, the flue gases may pass through the 35 superheater recess into the smoke box, while when the damper is closed the flow of hot gases through the superheater recess will be prevented as required, to prevent the burning of the superheating tubes, when the flow of steam therethrough is shut off. The tubes or loops, H, are of substantially uniform length and the tubes are straight throughout, except as it becomes necessary to bend their extreme forward ends to accommodate them to the connections or openings in the.

headers, H. I The steam from the dry pipe, F, is distributed to the tubes, H, by means of headers or passages, Hlqand afterbeing superheated therein the steam is collected in other passages from headers, HS, which latter communicate with the feed pipes, G.

' Each tube or loop, H, has one of its ends connected the boiler is minutely subdividedand absorbing heat from the extensive surfaces afforded by the many pipes I I or tubes, H, is quickly raised to a high temperature.

Various steam distributing and collecting headers may be used in connection with the superheating tubes, H and if desired "said headers may be separate or distinct parts, but I prefer to employ the structure shown in the drawings, comprising a single casting wherein the necessary passages are formed. Referring to the drawings for the details of construction, it will be noted that the passages, HL and HS are vertical and are parallel, the same being distinguished by separati ng walls, H. The lower ends of all the passages are ends of the tubes, H are expanded or otherwise secured The forward walls of the passages, HL and HS" contain openings filled by plugs, H, which being removed permit access to the ends of the tube through the headers. The upper part of the casting is a rearwardly turned elbow, H which joins the dry pipe, F, as shown .in Fig. 1. -.This loop is connected with the tube passages; I IL-HL by ducts, HL (see Figs. i

and 3); that portion of the member,'H,': directly beneath the elbow, H is formed'i'ntoa cross portion,

H", terminating in forwardly turned elbows, H and upper ends of the three passages, HS (see Figs. 1, 3 and 4). The ends or loops, H, of the memben H, are connected with the upper ends of the steam'ieed pipes, G, as shown in Fig. l. I I I I containing a duct, HS,.which communicates with the I The peculiar forms and disposition'of the separating walls in the upper portion of the member H, will be clearly understood from Figs. 1 and 3. I prefer that the rear wall of the member, H, wherein the ends of the tubes, H, are secured shall be inclined downwardly and forwardly as represented in Fig. 1, with a view to the freer di scharge of cinders, but it will be obvious that said rear wall-may be parallel with the flue sheet, A In such cases I incline the forward wall of the -member, H,;to preserve the tapered form of the passages, HL and HS, which tapered form is adapted for -the purpose of equalizing the flow of steain to and 'tected fromthe direct impact and intense heatof the fire box gases.

'A further. advantage accrues through the employment of the large shell or flue wherein the' velocity of the gases is reduced so that a maximum of heat will be imparted to thewater in the boilr and to the superheating tubes. I? I,

It should be further noted that the structural convenience residing-in the employment of the large internal gshell is secured without materially depriving, the boiler of radiating surface and without disturbing the proper equalization of the flow of gases through all oi'the fines of the boiler. I

The advantages attaching to the various details of construction, such for example as the grouping of the superheatin'g' tubes in a single cavity or flue and the connection ofsaid tubes with a single rigid member,

upon herein. I The peculiar means which I employ for closing the forward end' ofthe superheater eavity and for controlling the flow of gases theretfirough, possessthe merit of simplicity and durability. I"desire also to point outand it shall be understood that the boiler herein shown possesses distinct advantages apart from the superheater and providing the deflecting plates are arranged therein may be used to advantage without the superheat r.

closed; the rear walls contain openings in which the 1 As various modifications of my invention will readily suggest'themselves to one skilled in the art, I do not confine my invention to the specific constructions herein shown and described. l

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. Improvements here'lndescrlbed, comprising a firetube boiler, its lire box and smoke box, incombination with a shellof less diameter than the boiler, the same extend-' ing from thefront tine sheet part way to the rear this sheet, a plurality of lines extending from, said rear flue sheet into thercar end of said shell, saturate and superheated steam headers provided in said smoke box at the open end of said shell and a group of loop pipes occupying said shell and connected with said headers, substantially as described.

2. A locomotive tire-tube boiler, its fire box and smoke box, in combination with a shell of less diameter than the boiler, opening through the front line sheet thereof and extending part way to the rear flue sheet. a plurality of lines connecting the tire box and shell, a group of loop tubes or iipesocciipying said shell and extendiiig part way to the rearcnd of said shell. an open space remaining in the rear end of said shell and suitable saturate and superheated. steam headers 'at the open end of said shell, within the smoke-box of the boiler and connected with said pipes, substantially as described.

3. A locomotive tire-tube boiler, its fire box and smoke box, in combination with a shell of less diameter than the boiler, opening through the front flue sheet thereof and. extending part wayto the rear this sheet, a plurality of lines connecting the tire box and shell, 11 group of loop tubes or pipes occupying said shell and extending part way to the rear end of 'said shell, an open space remaining in the rear end of said shell, suitable saturate and superhealed steam headers in said smoke-box whcrewith the forward ends of said pipes are connected with said pipes, and means in the smoke box for controlling the iiow of tire box gases through said shcll, substantially as described,

4, The improvements herein described, comprising a locomotive lire-tube boiler, its fire box and smoke box, in

combinaiion with a shell of'less diameter than the boiler,

opening through the front flue sheet thereof and extending 1 part way to the rear flue sheet, a plurality of short lines connecting the shell with the tire box, a group of superhcating pipes occupying said shell, suitable saturatemnd superheated steam headers whereto the forward ends osaid pipes are attached and a plurality of deflector plates provided .lngcd transversely within the shell. forming a tortuous passage therein, substantially as described.

5. The improvements herein described, comprising a locomotive tire-tubc boiler, its iire'box and smoke box, in combination with a shell having its rear end connected with the tire box by a plurality of short fines, the lfOlZWlll'll cad oi said shell opening through the front flue sheet of the boil-er, a single casting containing alternate saturate and superheated steam passages and substantially closing the forward end of said shell, suitable walls within said smoke box further closing the same a damper for compleiely closing said forward end and a plurality of loop pipes occupying said shell and having their forward end connected with respective passages in said casting, substantially as described.

6. A locomotive fire-tube boiler, its fire box and smoke box, in combination with a shell arranged within the boiler and connected with the tire box by a plurality of short tines, the forward end of said shell opening through the front flue sheet of the boiler and 'a plurality of vertical forwardly inclined alternated deflector plates arranged within said shell and provided with openings for superheater pipe's. as and for the purpose described.

1'. A locomotive lire-tube boiler, its fire box and smoke box, in combination with' a.corrugated cylindrical shell connected with the tire box by a plurality of short lines or tubes, said shell opening through the front flue sheet of the boiler, a plurality of saturate and superheated steam beaders arranged in said smoke box and substantially closing the forward end of said shell, 51 plurality of loop pipes occopying said shell and connected with said headers and a plurality of deflectors in said shell, substantially .as described. e p

8. The improvements herein described, comprising a metal casting containing a plurality of parallel vertical passages and also transverse passages connecting alternate parallel passages, to .receive saturate and superheated steam respectively, and a plurality of loop pipes, each connected with a saturate steam passage and a superheated steam passage, substantially as described. 7

9. The improvements herein described, comprising a tire iube boiler, its flre box and smoke box, in combination with a shell extending. through an opening in the front line sheet of the boiler, a plurality of tire tubes connecting the rear end of said shell with the-lire box, a superheater ar ranged in said shell and partially closing the front end thereof, saturate and superheated stcampipes connected with said supcrheater within said smoke box and a movable closure beneath said superheater for completely closing the forward end of said shell, substantially as described.

10. The improvements herein described, comprising a tire tube boiler having a smoke box and containing a tortuous passag a superheater comprising suitable headers in said smoke box and loops,in said passage, substantially as described. V

11. in a steam super-heater, a header comprising upright front and back walls, s. 2 walls, a plurality of ver-. tlcal partitions forminga plurality of saturate steam spaces and a plurality of superheated steam spaces therein, a posterior transverse passage connecting the upper. ends of the superheated steam spaces and an anterior chamber connecting the upper ends of the saturate steam spaces: said chamber and passage being provided with steam outlet and inlet connections respectively, substantially as described.

in testimony whereof, I have hereunto 'set my hand, this 31st day of October, 1906. in the presence of two subscril: 

